<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <a href="/user?opt=save">添加</a>
    <a href="/user?opt=delete">删除</a>
    <a href="/user?opt=update">更新</a>
    <a href="/user?opt=find">查看</a>
</body>
</html>